Eosinophilia
Eosinophilia is the exact opposite of lymphocytopia where there is an over-production in the number of white blood cells present in the bloodstream. Eosinophilia itself is not a disease but instead a disorder that results from an over-active response to a disease by the immune system in an attempt to destroy the foreign organism.
Eosinophils in the bloodstream release toxic substances that can kill foreign particles and micro-organisms in the body. If acute, this disease may further degenerate into a more complex disorder known as the Idiopathic Hypereosinophilic Syndrome.
This syndrome is commonly amongst elderly men and may seriously damage many internal organs such as the heart, lungs, liver, kidney and the skin. Heart attacks may result possibility of blood clots forming and malfunctioning the heart valves.

Treatment
Eosinophilia, if left untreated, can prove to be extremely dangerous for the individual with most dying within 2 years of contracting the disease. However, the success rate of treatment is also extremely high, with more than 80% of the patients still surviving. A cocktail of drugs may be given with prednisone or hydroxyurea. However, doctors must be certain that the eosinophilia was not a consequence of a parasitic infection or an allergic reaction.